Brent crude oil soared more than 4 per cent towards $59 a barrel on Thursday after Saudi Arabia and its Gulf Arab allies began a military operation in Yemen. Photo: Bloomberg

Brent crude oil soared more than 4 per cent towards $59 a barrel on Thursday after Saudi Arabia and its Gulf Arab allies began a military operation i(...)

Mr Putin has ordered the Russian Navy’s Northern Fleet and paratrooper units to go on full alert as part of snap military exercises in the Arctic. Photographer: Akos Stiller/Bloomberg

Russian president Vladimir Putin has ordered the Russian Navy’s Northern Fleet and paratrooper units to go on full alert as part of snap military exer(...)

Long journey: Samantha Power leaves the stage after speaking at the American Israel Public Affairs Committee conference in Washington this month. Photographs: Doug Mills/New York Times

Earlier this week journalists gathered in a small room in Brussels to listen to a tall red-headed American diplomat talk about UN peacekeeping. Her(...)

European Commission president Jean-Claude Juncker has always been in favour of  more integration of defence resources in the EU. Photograph: Frederick Florin/AFP/Getty Images

Jean-Claude Juncker’s call in a German weekend interview for a European army re-ignites a debate that has existed since the very beginnings of the Eur(...)

A Turkish soldier stands guard in a Black Sea port ahead of a Nato naval exercise. Photograph: Sasa Kavic/Reuters

Nato’s Black Sea members Bulgaria, Romania and Turkey joined the US, Canada, Germany and Italy in a multinational naval exercise just across the water(...)

EU Commission President Jean Claude Juncker’s suggestion that the union needs its own army to strengthen its credibility on the world stage should be (...)

 European Commission president Jean-Claude Juncker: said pooling military capability would demonstrate EU member states’ determination never to go to war against each other. Photograph: Sergio Perez/Reuters

European Commission president Jean-Claude Juncker has said a common European army would be a timely deterrent against further Russian aggression on th(...)

Members of the Defence Forces on Bray seafront before a rehearsal for the annual Air Spectacular show. Photograph: Matt Kavanagh

The Government is committed to the policy of military neutrality, Minister of State for the Diaspora Jimmy Deenihan told the Dail.“Our military neutra(...)

Taavi Roivas of the Reform Party which has 29.2 per cent of the vote with more than two-thirds of the votes counted.  Photograph: Ints Kalnins/Reuters

Estonia’s ruling centre-right party took the lead after an election on Sunday overshadowed by fears that neighbouring Russia might interfere in the sm(...)

Adam Osmayev, English-educated Chechen commander of a Ukrainian volunteer battalion. Photograph: Daniel McLaughlin

Wycliffe College, a €12,000-a-term boarding school in England’s bucolic Cotswolds, runs something called the “combined cadet force”.Through “military-(...)